Question

15 PONTOS!!!!!!
me ajuda é pra segunda

Answer 1

Resposta:

A)

$\frac{x}{6} = \frac{16}{12} \\ 12x = 96 \\ x = 8$

B)

$\frac{7}{5} = \frac{5}{y} \\ 7y = 25 \\ y = \frac{25}{7}$

C)

$\frac{3x}{4} = \frac{2}{6} \\ 18x = 8 \\ x = \frac{8}{18}$

D)

$\frac{20 - x}{20} = \frac{2}{5} \\ 5(20 - x) = 40 \\ 100 - 5x = 40 \\ 5x = 60 \\ x = \frac{60}{5} \\ x = 12$

E)

$\frac{4}{5} = \frac{20}{x + 1} \\ 4(x + 1) = 100 \\ 4x + 4 = 100 \\ 4x = 96 \\ x = \frac{96}{4} \\ x = 24$

F)

$\frac{5x + 10}{6} = \frac{7}{ \frac{2}{5} } \\ \frac{2}{5} (5x + 10) = 42 \\ 2x + 4 = 42 \\ 2x = 38 \\ x = 19$